Malicious PDF — malware analysis report

Static analysis result for SHA-256 34c6447228d68f79…

MALICIOUS

PDF

44.4 KB Created: 2021-06-03 08:10:55 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ea7ff9b873e63d06471092dfd96bc9d9 SHA-1: 3bb8be274db333732dfb4e0e26e92f6a6fa249d8 SHA-256: 34c6447228d68f79ea7fac828106ce23cf9d7a12c4f30cccc0f8d70e4d5cc036
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://netcdn.online/app/406889139/free-spins-coin-master-november-2021-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id//repository/www-roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/wwwhaktutsin-2021-08-coinmasterfreespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-map_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-its-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-games-with-free-boombox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004e16.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E16 26148 bytes
SHA-256: 51629f498436e6e32808c3b0c48f7908dfeaadde8be3135dccbf637f31723234
font_01_sfnt_off0000896d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x896D 18820 bytes
SHA-256: 51030d0b126b89f1cc2c8ab05e6528d79dc2725cd6845144c535f360e3c6c899

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